Questions Asked in May 2009

Most Popular Questions of May 2009

  1. physics

    Reggie Jackson stepped up to the plate and hit a .15 kg fast ball traveling at 36m/s, the impact caused the ball to leave his bat with a velocity of 45 m/s in the opposite direction. If the impact lasted for .002 seconds, with what force did Jackson exert

    asked by chelsea on May 27, 2009
  2. chemistry

    I am asked to draw the structure of n-butyne, but what is meant by n-butyne? Please help! Any help will be appreciated.

    asked by anonymous on May 2, 2009
  3. Chemistry

    SO2(g) + NO2(g) SO3(g) + NO (g) At a given temperature, analysis of an equilibrium mixture found [SO2] = 4.00 M, [NO2] = 0.500 M, [SO3] = 3.00 M, and [NO] = 2.00 M. (a) What is the new equilibrium concentration of NO when 1.50 moles of NO2 are added to the

    asked by Andre on May 11, 2009
  4. physics

    You need to siphon water from a clogged sink. The sink has an area of 0.36 and is filled to a height of 4.0 . Your siphon tube rises 45 above the bottom of the sink and then descends 85 to a pail as shown in the figure. The siphon tube has a diameter of

    asked by kelsi on May 21, 2009
  5. covalent or ionic bond

    Is Mercury (ii) Chloride a covalent bond or ionic?

    asked by Mike on May 4, 2009
  6. science

    explain how the lack of atmosphere moisture in california's mohave desert causes a large daily temperature range.

    asked by Anonymous on May 19, 2009
  7. college

    how would you go about doing this type of problem thank you You are trying to raise a bicycle wheel of mass x and radius r up over a curb of height h . To do this, you apply a horizontal force . 1. What is the least magnitude of the force that will succeed

    asked by amy on May 18, 2009
  8. Chem

    How much water must be added to 500.mL of .200M HCL to produce a .150M solution? (.500mL x .200M)/.150M = .667mL Correct? A chemistry student needs 125mL f .150M NaOH solution for her experiment, but the only solution avail. is 3.00M. Describe how the

    asked by Chopsticks on May 1, 2009
  9. Math riddle

    What is one problem That Rocket Scientist, Dr. Awkward, never has?

    asked by Marco on May 3, 2009
  10. Physics

    A pinball machine uses a spring that is compressed 4.0 cm to launch a ball. If the spring constant is 13 N/m, what is the force on the ball at the moment the spring is released? I don't understand this I guess... Does the ball leave the spring at the

    asked by HELP ME! on May 16, 2009
  11. math

    a supervisor must split 60 hours of overtime between five people. One employee must be assigned twice the number of hours as each of the other four employees. How many hours of overtime will be assigned to each employee?

    asked by bev on May 18, 2009
  12. physics imperfect spring

    The force required to compress an imperfect horizontal spring an amount x is given by F= 150x+12x^3, where x is in meters and F in newtons. If the spring is compressed 2.1 m, what speed will it give to a 4.0 kg ball held against it and then released?

    asked by annie on May 21, 2009
  13. college math

    A jet leaves a runway whose bearing is N26E from the control tower. After flying 4 miles, the jet turns 99 degrees and flies on a bearing of s55e for 6 miles. At that time what is the bearing from the jet from the control tower. I have no idea how to solve

    asked by Jon on May 9, 2009
  14. Algebra

    In triangle PQR shown, point S (not shown)is on QR between Q and R. Give one possible value for the length of PS ...Explain your reasoning.. Triangle PQR = 13" PQ = 6" QR = 2" PR = 5" I need help in figuring this out this triangle with an equation or

    asked by JAY10 on May 13, 2009
  15. physics

    A human wave. During sporting events within large, densely packed stadiums, spectators will send a wave (or pulse) around the stadium (Fig. below). As the wave reaches a group of spectators, they stand with a cheer and then sit. At any instant, the width w

    asked by chirayu on May 1, 2009
  16. Math

    Why doesn't Gyro on Even Numbers When Playing Roulette?

    asked by John on May 10, 2009
  17. Physics

    Two stunt drivers drive directly toward each other. At time t=0 the two cars are a distance D apart, car 1 is at rest, and car 2 is moving to the left with speed v_0. Car 1 begins to move at t=0, speeding up with a constant acceleration a_x. Car 2

    asked by RJ on May 26, 2009
  18. chemistry

    How would SiO4 Lewis structure look like? Each oxygen has 1 unfilled electron, so would there be 2 double bonds? Thanks in advance.

    asked by sh on May 5, 2009
  19. math

    if sin6A=cos9A, then angle A is equal to? 1 6 2 36 3 54 4 1 half

    asked by Anonymous on May 20, 2009
  20. physics

    an airplane is flying in a horizontal circle at a speed of 430 km/h if its wings are tilted 40 degrees to the horizontal what is the radius of the circle in which the plane is flying? assume that the required force is provided entirely by an "aerodynamic

    asked by chelsea on May 27, 2009
  21. English

    1. What do you usually do after school? I always go to an academy. I always go to my academy. I always go to our academy. I always go to the academy. (Which answer is right and commonly used?) 2. I have a father, a mother, and a sister. 3. I have Father,

    asked by John on May 20, 2009
  22. Calculus

    A light is suspended at a height h above the floor. The illumination at the point P is inversely proportional to the square of the distance from the point P to the light and directly proportional to the cosine of the angle θ. How far from the floor should

    asked by Dominick on May 1, 2009
  23. Trig

    The angle 2x lies in the fourth quadrant such that cos2x=8/17. 1.Which quadrant contains angle x? 2. Determine an exact value for cosx 3. What is the measure of x in radians? ---------------- I know that quadrant 4 has 2x in it, so quadrant _____ has to

    asked by Halle on May 31, 2009
  24. chemistry

    Calculating Parts per million Helium gas, 3.0 x 10^-4 is dissolved in 200.0 g of water. Express this concentrartion in parts per million.

    asked by tom on May 6, 2009
  25. math

    Bill Shass pays a property tax of $3,200. In his community, the tax rate is 51 mills. What is Bill’s assessed value? (Round your answer to the nearest dollar amount. Omit the "$" sign in your response.)

    asked by anthony on May 5, 2009
  26. math

    The first ancient olympic games were held in 776 b.c. the ancient games were abolished in 393 a.d. The first modern olympics were held in 1896 a.d. a) How many years were there between the firstancient games and the year they were abolished? b) How many

    asked by rebecca on May 7, 2009
  27. Chemistry

    An ion exchange process may be used to remove ions causing hardness of water. Outline how this works. 1. Ca2+ and Mg2+ are the ions that cause the hardness of water, one example of softening the water is to react the hard water with NaCO3 (Sodium

    asked by Annie on May 30, 2009
  28. Pre-Algebra

    Is this correct? Which of the following best describes every parallelogram? A. a quadrilateral with only one pair of congruent sides B. a quadrilateral with only one pair of congruent angles C. a quadrilateral with both pairs of opposite sides parallel D.

    asked by mysterychicken on May 26, 2009
  29. English

    I did not really understand the poem, Moon Rondeau. Here is the lyrics: "Love is a door we shall open together." So they told each other under the moon One evening when the smell of leaf mould And the beginnings of roses and potatoes Came on a wind. Late

    asked by Priscilla on May 16, 2009
  30. English

    What is wrong with this sentence? Since I no longer maintain an office downtown for working on this kind of project.

    asked by Anonymous on May 11, 2009
  31. Spanish

    I need help understanding how to ask/answer questions using the word 'Que'. If the question is ?Que' estudias tu'? is the correct answer: 'Yo estudio ___' and then whatever you're studying or could I simply answer 'Estudio ____' Also, in these questions,

    asked by Kara on May 5, 2009
  32. 7th grade

    unit price 100 sheets for $0.99 500 sheets for $4.29 Which is a better buy?

    asked by Deangelo on May 18, 2009
  33. chemistry

    I asked this question earlier that drbob explained but i still do not really understand what to do. can you please make it clearer? the average pH of healthy human blood is 7.4. how many moles of H+ ions are free in your blood. The average person has

    asked by cara on May 25, 2009
  34. chemistry help

    A solution of AgNO3 contains 29.66 g of solute in 100.0 mL of solution. What is the molarity of the solution?

    asked by chris on May 9, 2009
  35. math

    A bond has an average return of 6.8 percent and a standard deviation of 4.6 percent. What range of returns would you expect to see 68 percent of the time? a. 2.2 percent to 11.4 percent b. 4.6 percent to 11.4 percent c. 4.6 percent to 22.8 percent d. 11.4

    asked by Emi on May 7, 2009
  36. trig

    A city averages 14 hours of daylight in June, 10 in December, 12 in both March and September. Assume that the number of hours of daylight varies sinusoidally over a period of one year. Write an expression for n, the number of hours of daylight, as a cosine

    asked by Kelslie on May 4, 2009
  37. computers networking

    A firm is assigned the network part 128.171. It selects a 8-bit subnet part. a) Draw the bits for the four octets of the IP address of the first host on the first subnet. (Hint: Use Windows Calculator.) b) Convert this answer into dotted decimal notation.

    asked by Nguyen on May 8, 2009
  38. Chemistry 101

    Aluminum reacts with sulfur gas to form aluminum sulfide. Initially 1.18 ml of aluminum and 2.25mol of sulfur are combined. 1. write a balanced equation? 2. what is the limiting reaction? 3. what is the theoretical yield of aluminum sulfide in moles? How

    asked by Gweedo8 on May 31, 2009
  39. biology help please

    Compare the pig brain to drawings of a human brain, a fish brain, and a bird brain. Can you see how the pig’s anatomy parallels human anatomy? What can you conclude about our relation to animals like pigs? Like birds? Like fish? I have not been able to

    asked by sam on May 16, 2009
  40. Chemistry

    Use the drawing of a molecular orbital energy diagram for ClF to predict the bond order?

    asked by gnozahs on May 4, 2009
  41. chemistry

    A sample of 300.0g of drinking wtare is found to cntain 38 mg Pb. What is this concentration in parts per million?

    asked by peter on May 8, 2009
  42. Chemistry..Please Help

    HENRY'S LAW I did the first one im not sure how to do the 2 and the 3rd question. 1. What is the Henry's law constant for CO2 at 20{C}? C=kP K=c/p = 3.70*10^-2/1.00atm= 0.037 2. What pressure is required to achieve a CO2 concentration of 6.00×10−2 at

    asked by Saira on May 29, 2009
  43. Chemistry

    What is the molar solubility of PbCl2 in a solution of 0.23 M CaCl2? Ksp = 1.6 10-5 for PbCl2. idk how to do this because of the Cl2

    asked by Jason on May 11, 2009
  44. science

    why are karyotypes important tools for genetics?

    asked by Anonymous on May 12, 2009
  45. Inorganic chemistry

    Nitrogen dioxide reacts with carbon monoxide to produce nitrogen monoxide and carbon dioxide. NO2(g) + CO(g) ==>NO(g) + CO2(g) A proposed mechanism for this reaction is 2No2(g) = NO3(g) + NO(g) (fast,equilibrium) NO2(g) + CO(g) ==> NO2(g) + CO2(g) (slow)

    asked by Steve on May 12, 2009
  46. global

    one similarity between the rule of Peter the Great of Russia and that of Akbar the great of india was that both leaders a. modernized and expanded their empires using ideas from other cultures b. introduced democratic ideas ino their political systems c.

    asked by Chantel on May 31, 2009
  47. zero cubed

    What is zero cubed or zero to the third power

    asked by Paul on May 1, 2009
  48. Chemistry..

    A protein subunit from an enzyme is part of a research study and needs to be characterized. A total of 0.180 g of this subunit was dissolved in enough water to produce 2.00 mL of solution. At 28C the osmotic pressure produced by the solution was 0.138 atm.

    asked by Saira on May 29, 2009
  49. Chemistry

    1. What are the products to the reaction below: NH3+CH3CH2CH2Br-->? 2. Why does oxaloacetic acid has a higher Ka compared to succinic acid? 3. Which hydrogen atoms will malic lose if it ionizes completely? No ideas on any of these questions. Please help!

    asked by anonymous on May 12, 2009
  50. Chemistry

    Which element has no stable isotopes? 1. (subscript)27 Co 2. (subscript)51 Sb 3. (subscript)90 Th 4. (subscript)82 Pb I believe it's either 2 or 3, but I can't decide which. I'm not sure how to go about answering this question, how can you tell which have

    asked by Anonymous on May 26, 2009
  51. english.poem.i am offering this poem

    which of the following statements BEST explains why I am offering this Poem is considered a lyric poem? a. it is a simple poem that tells a story b. it is a tragic poem that teaches a lesson c. it si a short poem that expresses stron emotion d. it is a

    asked by y912f on May 27, 2009
  52. Chemistry limiting reactants

    A student prepares phosphorous acid by reacting solid phosphorous triodide with water PI3+H2O-->H3PO3+HI The student needs to obtain 0.250L of phosphorous acid. (d=1.651g/mL). The procedure calls for a 45.0% excess of water and a yield of 75.0%. How much

    asked by Gweedo8 on May 31, 2009
  53. chemistry help

    What ratio does molarity express?

    asked by tom on May 18, 2009
  54. physics

    the relationship bwtween frequency, wavelength, and speed holds for light waves because all forms of electromagnetic radiation travel at a single speed in a vaccum. is this true?? or do different forms of electromagnetic radiation travel at different

    asked by Claudia on May 17, 2009
  55. math

    a cable television firm presently serves 5000 households and charges $20 per month. A merketing survey indicates that each decrease of $1 in the monthly charge will result in 500 new costumers. Let R(x)denote the total monthly revenue when the monthly

    asked by Anonymous on May 25, 2009
  56. A Midsummer Night's Dream, Act 4

    "The fourth act opens and ends with Bottom at center stage. What is your opinion of Bottom's character? How might he be the antithesis, or opposite, of Theseus's character?" Does anyone know how to answer the last part of the question? I didn't even

    asked by Emily on May 9, 2009
  57. Algebra I

    Use A = P(1+r)^t to find the interest rate. $2000 grows to $2420 in 2 years. I have no idea how to go about this problem! Your help is appreciated. Thank you!!

    asked by Faith on May 11, 2009
  58. math

    Henry Devine bought a new dishwasher for 320. He paid 20 down and made 10 monthly payments of 34. What actual yearly interest rate did Henry pay? using this formula r=2mI/p(n+1) i got this r=2(12)(20)/300(10+1)= but i don't know what to do next . can you

    asked by joe on May 31, 2009
  59. Chemistry

    Can you tell me what the empirical formulas are for C2H6O4 N2O5 Hg2Cl2 C6H12 Thank you!

    asked by Tal on May 27, 2009
  60. physics loop

    The small mass m sliding without friction along the looped track is to remain on the track at all times, even at the very top of the loop of radius r. (not unlike a roller coaster) A)In terms of the given quantities, determine the minimum release height h.

    asked by annie on May 22, 2009
  61. english[simile]

    complete the simile the rock stood....

    asked by santosh on May 3, 2009
  62. english

    hi, does anyone have any information on the poem "the railings' by roger mcgough. im after anything really, opinions, analysis, explanations. Thanks for any help!

    asked by tim on May 4, 2009
  63. physics spring

    A glider on an air track is connected by springs to either end of the track. Both springs have the same spring constant,k , and the glider has mass M. A)Determine the frequency of the oscillation, assuming no damping, if k= 125N/m and M= 250g. (I got the

    asked by annie on May 21, 2009
  64. Spanish

    Can someone help me with this please Re-write the following dialogue adding the correct form of “estar” or the gerundio of the verb (other than estar) in parenthesis to form the present progressive form. Jose: Hola María. ¿Qué ___(5)___ (ESTAR tú)

    asked by Jordan on May 25, 2009
  65. Chemistry

    What happens to these physical properties as the strength of intermolecular forces increases? My answers are there as well but its not correct Increase or decrease? a) melting point - increases b) vapor pressure-increases c) boiling point- increases d)

    asked by Saira on May 11, 2009
  66. science

    MY QUESTION IS: how do adaptations enable organisms to reduce competition for food and other resources? thank u please respond before 9

    asked by elenny on May 13, 2009
  67. Math

    Suppose y varies directly with x and y=12 when x=6. Write an equation realting x and y. Please help, do not understand.

    asked by Gaby on May 20, 2009
  68. physics

    The scale of a spring balance reading from 0 to 250N has a length of 10.0 cm. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.85 Hz. Ignoring the mass of the spring, what is the mass m of the fish? (and why the heck

    asked by clueless on May 22, 2009
  69. Chem

    Calculate the expected volume of hot water that would be required to dissolve 0.15g of benzoic acid, vanillin, phthalic acid, salicyclic acid? You don't need to do all or any of them. I just need to know what formula to use and what to sub in and I can do

    asked by Sam on May 25, 2009
  70. chemistry

    1. All of the following are structural isomers of CH2=CHCH2CH=CHCH3 EXCEPT a. CH2=CHCH2CH2CH=CH2 b. CH3CH=CHCH2CH=CH2 c. CH3CH=CHCH=CHCH3 d. CH2=C=CHCH2CH2CH3 Is it D? 2. Almost all of the amoino acids found in living organisms are in the L-form. L-Alanine

    asked by anonymous on May 7, 2009
  71. chem help asap

    Describe how you would prepare 250.0 mL of a 0.500 M solution of NaCl by using apparatus found in a chemistry lab.

    asked by brown on May 28, 2009

    Predict which solvent will dissolve more of the given solute: a) Sodium Chloride in methanol (CH3OH) or in 1-propanol (CH3Ch2Ch2OH) Ans. I believe that sodium chloride would dissolve readily in methanol b) Ethylene glycol (HOCh2Ch2OH) in hexane

    asked by Ashley on May 26, 2009
  73. Math

    Two points A and B are on opposite sides of a building. A surveyor selects a third point C to place a transit Point C is 47 feet from point A and 64 feet from point B. The angle ACB is 56 degrees. How far apart are points A and B?

    asked by Sarah on May 3, 2009
  74. CHemistry

    My professor gave us these question in call and we solved for it in class, however im not sure how we got the answers. I dunt really understand the concept of intermolecular forces if some can please help me i have a quiz tomorrow. A. For each pair of

    asked by Saira on May 12, 2009
  75. Math

    A surveyor standing 56 meters form the base of a building measures the angle to the top of the building and finds it to be 36 degrees. Thesurveyor then measures the angle to the top of the radio tower on the guilding and find that it is 47 degrees. How

    asked by Sarah on May 3, 2009
  76. science

    a compound that has positive and negative ions in a regular pattern or crystal is an_______________

    asked by Nick on May 14, 2009
  77. chemistry

    Solid Na2SO4 is added to a solution which is 0.014 M in Pb(NO3)2 and 0.041 M in AgNO3. Assume the volume remains constant. Ksp = 2.0 10-8 for PbSO4 and Ksp = 1.2 10-5 for Ag2SO4. (a) Which compound precipitates first? 1 PbSO4 (b) What is the concentration

    asked by Andre on May 11, 2009
  78. Chemistry

    I've been given the formula NH4Br, and I want to make sure I properly separated it into cations and anions. I got NH+1 and Br-1. The only thing is I don't get why NH in the formula is NH4. Where does the four come from?

    asked by Carolyn on May 31, 2009
  79. science

    What is the freezing point of a solution of 12.0 g of CCl4 dissolved in 750.0 g of benzene? The freezing point of benzene is 5.48°C; Kf is 5.12°C/m.

    asked by Stephanie on May 6, 2009
  80. chemistry

    An aqueous solution with a pH of 3.00 is diluted from 2.0 L to 4.0 L. Wht is the pH of the diluted solution?

    asked by j on May 5, 2009
  81. Physics

    A person makes a quantity of iced tea by mixing 500g of hot tea(c=4190J/(Kg.k) with an equal mass of ice(T=0c, L=333KJ/Kg). assume that mixture has negligible energy exchange with environment. If tea's initial temperature is 90c, then what is the

    asked by sid on May 26, 2009
  82. Shakespeare

    How would I use ellipses in Shakspearean quotes? I know that after every line you put a / but I want to omit like half a speech and get to the end. How would I do this? This is what I want to use: “You call me misbeliever, cutthroat dog/ And you spit

    asked by Lena on May 6, 2009
  83. computers networking

    Assume that an average SNMP response message is 100 bytes long. Assume that a manager sends 40 SNMP Get commands each second. a) What percentage of a 100 Mbps LAN link’s capacity would the resulting response traffic represent? b) What percentage of a 56

    asked by Hubert on May 8, 2009
  84. Grammar

    Can someone please check if my answers are correct? Identify the verb form that correctly completes each sentence: 1.At the stroke of midnight, the fireworks ________ into the night sky. A.burst B.bursts C.bursted D.bursting A 2.Jermaine, seeing the shower

    asked by mysterychicken on May 9, 2009
  85. Chemistry

    What is the molality of a solution made from 5.61 moles of KCl and 2.11 kg of water? I'm very lost on this one, could someone please help me?

    asked by Alan on May 28, 2009
  86. Math

    At a concert, the loudness of sound, L, in decibels, is given by the equation L=10log(I/I_o), where I is the intensity, in watts per square metre, and I_o, is the minimum intensity of sound audible to the average person, or 1.0 x 10^-12 W/m^2. a) The sound

    asked by Jus on May 20, 2009
  87. History

    Historians have often labeled the period after World War II the “Age of Containment” or a period of “The Great Fear.” Why do you think the end of the war ushered in such a fearful age? What were some of the internal and external factors?

    asked by brooke on May 28, 2009
  88. Chem

    Sulfuric acid, H2SO4, reacts with CaF2 according to: CaF2 + H2SO4 ---> CaSO4 + 2 HF What is the minimum amount, in g, of impure H2SO4 (which is 83.5% H2SO4 by mass) that would be required to produce 16.2 g of HF when reacted with excess CaF2 ? Could

    asked by rory on May 16, 2009
  89. Geometry

    In the diagram below of right triangle ACB, altitude CD intersects AB at D. If AD=3 and DB=4, find the length of CD in simplest radical form. How do I go about figuring out this problem? Please help. thanks

    asked by Anonymous on May 12, 2009
  90. science

    Can you please tell me where is the sun in our galaxy? Also, some binary stars are called eclipsing binaries. Explain why this term is appropriate. (it gives a hint, saying: think about Algol as you come up with an answer.) I don't get it... Please help :)

    asked by maya on May 30, 2009
  91. physics

    A cord connected at one end to a block which can slide on an inclined plane has its other end wrapped around a cylinder resting in a depression at the top of the plane as shown in the figure (Intro 1 figure) . Determine the speed of the block after it has

    asked by gdfg on May 28, 2009
  92. exponential function

    An investment pays 8% interest, compounded annually. a) write an equation that expresses the amount, A, of the investment as a function of time, t, in years. b) determine how long it will take for this investment to double in value and then to triple in

    asked by Jus on May 17, 2009
  93. Inorganic chemistry

    The thermochemical equation for the combustion of hexane is shown below. C6H14(g) + 19/2Os(g) ==> 6CO2(g) + 7H2O(g) Delta H = -4163kJ What is the enthalpy change for the combustion of 2.50g C6H14? 2.50 g/86g = .029 mol -4163kJ/.029 = -1.43 x 10^5kJ

    asked by Steve on May 12, 2009
  94. o-chem

    So in lab, I was to oxidize 9-fluorenol to 9 fluorenone. The chemicals I used were: 100 mg. of 9-fluorenol in 6mL of acetone. 0.25 mL of glacial acetic acid and 1.2 mL of a 5.25% sodium hypochlorite solution. My question is if I attempt to oxidize

    asked by struggling with o-chem on May 4, 2009
  95. Chemistry

    The question says write a reaction for the ionization of the following compound in water. Identify the acid, the base, the conjugate acid, and the conjugate base in each of them. 1. H2SO4 2. KOH 3. CH3COOH 4. NH3 5. HNO3 My guesses are: H2SO4 + H2O -> H3O+

    asked by Samantha on May 31, 2009
  96. Grammar

    Identify the entire verb phrase: 1.The whole event had been secretly planned by the Wong twins. Ans- had been secretly planned 2.Hadn't you ever been to a state fair before? A.hadn't ever been B.had ever been C.had been D.hadn't been A Are these correct?

    asked by mysterychicken on May 11, 2009
  97. physics torque and shelf

    When a wood shelf of mass 6.1 kg is fastened inside a slot in a vertical support, the support exerts a torque on the shelf. The board is 32cm wide by 3cm tall. the slot is 2 cm wide (3cm tall)on the lefthand side. So there are three vertical forces. A)

    asked by kelsi on May 22, 2009
  98. Math

    Which ordered pair is a solution of the system of equations y=x^2-x-20 and y=3x-15? a. (-5,-30) b. (-1,-18) c. (0,5) d. (5,-1) When I solved the system of equations I got 5 and -1. What do I do next?

    asked by Angie on May 17, 2009
  99. chemistry

    what mass of AgNO3 can be dissolved in 250 grams of water at 20 degrees C?

    asked by Anonymous on May 19, 2009
  100. goemetry

    a wheelchair ramp has a slope of 1/10.if its rise is 5 1/2 feet,what is its run?

    asked by geass on May 26, 2009